he is our president, and when he does something well, i praise him. >> reporter: but warren hit brown for raising money by tying his re-election to republicans gaining control of the senate. >> when senator brown talks here in massachusetts about how very bipartisan he is and how very independent he is, he's sure not saying the same thing when he goes around the country raising money. >> reporter: both candidates made awkward stumbles. warren was asked to name a republican senator she could work with. >> probably richard lugar would be one to come to mind. >> reporter: indiana's dick lugar is actually retiring. >> that is a problem. >> reporter: and brown, who is a lawyer, appeared unprepared for this. >> who is your model supreme court justice? >> after touting bipartisanship brown first named an ultra conservative. >> let me see here. that's a great question. i think justice cascalia is a vy good judge, justice kennedy. >> reporter: and for warren it's a challenge because massachusetts has never elected a woman to the senate or as governor. for brown, with his big election year turn